This one was one of my better images taken in 2012. I had a new camera and I was putting it through its paces.
The beautiful California Nebula in Perseus.
This was 84 sub-images of 3 min each at ISO 800 combined with 5 subs of 15 minutes each shot at ISO 400. All images done with a Televue TV-85 with a 0.8x focal reducer for F/5.6 speed, a Canon T3 modified DSLR camera and a IDAS-LPR filter.
I took this with my Televue TV-85 refractor and combined 2 nights worth of data. The exposures ran like this: 46×180″ ISO1600, 11×900″ ISO400 and 57×360″ ISO800. Gamma Cassiopeia is the really bright star in the center and overwhelms the sensor, so I had to suppress it quite a bit in processing.
This is a composite image of the Belt of Orion area combining images shot with a Canon 200 mm F/2.8 lens at F/3.5 and at F/2.8, plus the Orion Nebula area and Horsehead area each imaged separately with a TV-85. RegiStar was used to align the separate images and PSCS2 was used to stack and blend the images together and crop them to form the final version seen here.